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s. M. KNOPF. ATTACHMENT FOR TELEPHONES APPLICATION- FILED MM 2, 1918 1,341,855. Patented June 1, 1920.

V INYENTUR UNITED STATES PATENT OFFICE.

ATTACHMENT FOR TELEPHONES.

Specification of Letters Patent.

Patented J one 1, 1920.

Application filed May 2, 1918. Serial No. 232,031.

To all whom it may concern:

Be it known that I, SIDNEY M. Knorr, a subject of Austria, and resident of the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Attach ments for Telephones, of which the followin is a specification.

Ihe present invention relates to an im proved attachment for telephones an object of the invention being to provice such an attachment which will enable the person telephoning to have free use of both hands, that is, he is relieved of the necessity of holding the receiver in one hand as is necessary with the ordinary telephone, and at the same time will not in any way interfere with the operation of the telephone, but will in fact amplify the sound.

To this end, I propose, in the present embodiment, to provide a permanent support for the receiver, independent of the movable spring actuated hook, and an extension for the receiver, attached thereto by the support and so disposed that the persons car will be in contact therewith while talking. I also propose to provide an improved hook operating means comprising a weight, and a bracket carried by the receiver support for supporting the weight in operative position while talking.

In the present embodiment of the invention, the parts are so constructed and related that one bolt secures the whole attachment in place. Further objects of the invention are simplicit of construction, ease of attachment an eflicienoy'in operation.

With t see and other objects in view, an embodiment of my inventlon is shown in the accompanyin drawings, and this embodiment will be ereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the accompanying drawin s:

Fi ure 1 is a side elevation ot a telephone showing my attachment in place, and illustrating in dotted lines the manner of mak the hook inoperative by a weight;

ig. 2 is a front View thereof;

Fig. 3 is a plan view;

Fig. 4 is a view partly in section, showing the connection between the receiver and the extension for the receiver;

Fig. 5 is a plan view of the receiver support and weight supporting bracket; and

Figs. 6 and 7 are side and front views re spectively of the weight supporting bracket.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the telephone instrument shown therein comprises a main post 10, having at its lower end a base 11, and at its upper end a pivotally mounted mouth piece 12, and extending laterally therefrom there is provided a spring operated hook 13 which is used to support the receiver 14, the telephone being made operative by removing the receiver from the hook, whereupon the hook is raised as shown in dotted lines, Fig. 2, by means of a spring, as is well known.

The present embodiment of my invention consists of a pair of supporting members, each having at one end semicircular portions 15 and 16 adapted to engage the post 10 of the telephone, and in spaced relation thereto, semicircular clampirm portions 17 and 18 provided with inwardly extending flanges 19 and 20, the intermediate portions 21 and 22 having registering openings 23 therein through which a bolt 24 is adapted to be placed and secured by means of a win ed nut 25. e

T e semicircular portions 17 and 18 are of such size as to engage the enlarged portion 26 of the receiver the lower flanges 20 extending beneath the said portion 26 and supportlng the receiver.

The extension for the receiver comprises an ear engagin piece 27, an elongated flexible tube 28, an a cup'shaped member 29 secured to the end of the tube by means of an inturned central )ortion 30, within which the tube is solders or otherwise suitably secured as at 31. The cup-shaped member 29 is provided at its outer eriphery with a beaded edge or flan e 32, w ich rests upon the upper surface 0 the ortion 26 of the receiver, the flanges 19 of t e support adapted to engage over the said flange 32 of the member 29, and hold the same tightly in engagement with the receiver. In order to make a sound-tight connection between the extension and the receiver, a tubular rubber piece 33 is rovided about the portion 30 projecting s ightly therefrom, and engages resiliently and tightly upon the concave ortion 3d of the receiver about the open- 111g 35, by forcing the flange 32 a 'ainst the upper surface of the ring 26 and beneath the flange 19. The sound is thus amplified.

The hook is held in inoperative position by means of a ball weight 36, suspended at the end of a chain or cord 37 tied to one of the ring portions 38 of the hook. A supporting bracket for supporting the same in inoperative position is secured to the intermediate portions 21 and 22 of the receiver support, and is preferably constructed from heavy wire bent to shape, and comprises a perpendicular portion 39 bent laterally as at 40, and upwardly as at 41, an eyelet 4-2 being provided at the end of the portion 41 which is adapted to be engaged by the bolt 2% and held in place against the side of the portion 22 by means of the winged nut 25. At the lower end of the portion 39 there is provided a lateral ring or pocket 4:3, in which the ball is adapted to be supported during 0 )eration of the telephone, as clearly indicate in Figs. 1, 2 and 3. In this position, it will be readily seen that the hook is freed from the weight of the ball, and moves into the dotted line position shown in Fi 2.

All the parts of my attachment accort ing to the present form, it will be not-ed, are rigidly secured in place by means of the single bolt and nut 2i and 25, the receiver being rigidly supported, while the receiver extension is tightly connected thereto, and in such manner that the transmission of sound is in no way interfered with.

The flexibility of the extension permits of its adjustment to the car, so that a person may talk with comfort. The device may be readily attached to any of the standard types of telephone instruments, is neither cumbersome nor does it occupy any more space than the telephone in its ordinary use, and a per son while talking may have free use of both hands. Extended conversation may be had without discomfort to the ear, or tiring the arm.

I have illustrated a preferred and satisfactory embodiment of my invention, but it is obvious that changes may he made therein within the spirit and scope thereof, as defined in the appended claims.

I claim:

1. The combination with a telephone instrument having a spring operated hook and a receiver removable therefrom during operation of the telephone, of an attachment comprising supporting means consisting of clamping means adapted to engage the telephone post, and: clamping means adapted to engage the end of the receiver, an attaching device operative to clamp said sup aorting means on said telephone post anc receivcr, an extension for said receiver adapted to be secured thereto by said receiver clamping means, and means independent of said receiver for operating said'hook to make said telephone operative and inoperative.

2. The combination with a telephone instrument having a spring operated hook and a receiver removable therefrom during operation of the telephone and provided at its end with an annular ring having laterally disposed upper and lower surfaces, of an attachment comprising clamping means adapted to engage the telephone post, and annular clamplng means adapted to engage said annular ring, an extension for said receiver having a cup-shaped portion provided with an annular flange adapted to engage the upper lateral surface of said rin said annular clamping means having flanges adapted to respectively engage beneath the lower lateral surface of said ring, and over the flange of said cup-shaped portion to support said receiver and secure said extension thereto, and means independent of said receiver for operating said hook to make said telephone operative and inoperative.

3. The combination with a, telephone instrument haying a spring operated hook and.

a receiver removable therefrom during operation of the telephone, of an attachment comprising supporting means attached to the telephone post and adapted to support the receiver during the operation of the telephone, an extension for said receiver adapted to be secured thereto by said support, a wei ht independent of said receiver suspended from said hook, and a bracket secured to said support and adapted to support said weight in inoperative position during operation of the telephone.

In testimony that I claim the foregoing as my invention, I have si ned n1 name.

M. I 'NOPF.

SIDN 1 

